SXUS43 KMQT 160900 RECMQT MIZ001-162000- Recreational Forecast for Isle Royale National Park National Weather Service Marquette MI 500 AM EDT Thu Apr 16 2026 Isle Royale (SW areas)- Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge, and Windigo- ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... .TODAY...Partly sunny. Areas of dense fog early, then patchy fog by late morning. Highs 39 to 44. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .TONIGHT...Patchy fog. A 20 percent chance of rain showers late. Mostly cloudy. Lows around 35. East winds 5 to 15 mph. Waves building to 1 to 2 feet. .FRIDAY...Patchy fog through early afternoon. A 50 percent chance of rain showers and thunderstorms by mid afternoon. Mostly cloudy. Highs 44 to 49. Southeast winds 5 to 15 mph becoming north late. Waves 1 to 2 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, freezing rain, snow showers and sleet late. Mostly cloudy. Lows around 28. Northwest winds 10 to 20 mph becoming west by midnight, then becoming northwest late. Chance of precipitation 80 percent. Waves building to 3 to 5 feet. .SATURDAY...Breezy, cooler. Mostly cloudy. Highs around 33. West winds 10 to 20 mph. Waves building to 3 to 6 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 24. .SUNDAY...Partly cloudy. Highs around 36. .SUNDAY NIGHT...Mostly clear. Lows around 28. .MONDAY...Sunny through early afternoon then becoming partly sunny. Highs around 41. .MONDAY NIGHT...Mostly cloudy. Lows around 36. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 45. Lows around 34. .WEDNESDAY...Sunny. Highs around 42. && Isle Royale (NE areas)- Including Greenstone Ridge North, Malone Bay, Mount Saginaw, and Rock Harbor- ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... .TODAY...Partly sunny. Widespread dense fog early, then patchy fog by late morning. Highs 37 to 42. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .TONIGHT...Areas of fog through midnight, then patchy fog late. A 20 percent chance of rain showers late. Mostly cloudy. Lows around 35. East winds 5 to 15 mph. Waves building to 2 to 3 feet. .FRIDAY...Patchy fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms by mid afternoon. Mostly cloudy. Highs around 41 at the shore and 43 to 48 inland. Southeast winds 5 to 15 mph. Chance of precipitation 40 percent. Waves building to 3 to 6 feet. .FRIDAY NIGHT...Breezy. Rain showers and a slight chance of thunderstorms through midnight, then a slight chance of rain showers, freezing rain and sleet late. Mostly cloudy. Lows around 29. Southwest winds 10 to 20 mph becoming northwest 15 to 25 mph late. Chance of precipitation 80 percent. Waves building to 4 to 7 feet. .SATURDAY...Breezy, cold. Partly sunny. Highs around 32. West winds 15 to 25 mph. Waves 3 to 5 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 24. .SUNDAY...Partly sunny through early afternoon then becoming mostly sunny. Highs around 34. .SUNDAY NIGHT...Mostly clear. Lows around 29. .MONDAY...Sunny through early afternoon then becoming partly cloudy. Highs around 40. .MONDAY NIGHT...Mostly cloudy. Lows around 36. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 43. Lows around 34. .WEDNESDAY...Sunny. Highs around 40. && Isle Royale (NW areas)- Including Amygdaloid Island, Lookout Louise, and Minong Mine- ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... .TODAY...Partly sunny. Areas of dense fog early, then patchy fog by late morning. Highs 37 to 42. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .TONIGHT...Areas of fog through midnight, then patchy fog late. A 20 percent chance of rain showers late. Mostly cloudy. Lows around 34. East winds 5 to 15 mph. Waves building to 2 to 3 feet. .FRIDAY...Patchy fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms by mid afternoon. Mostly cloudy. Highs 42 to 47. Southeast winds 5 to 15 mph. Chance of precipitation 40 percent. Waves building to 3 to 5 feet. .FRIDAY NIGHT...Breezy. Rain showers and a slight chance of thunderstorms through midnight, then a slight chance of rain showers, freezing rain and sleet late. Mostly cloudy. Lows around 28. Southwest winds 10 to 20 mph becoming northwest 15 to 25 mph late. Chance of precipitation 80 percent. Waves building to 3 to 6 feet. .SATURDAY...Breezy, cooler. Mostly cloudy. Highs around 33. West winds 15 to 25 mph. Waves building to 4 to 7 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 23. .SUNDAY...Partly sunny through early afternoon then becoming mostly sunny. Highs around 34. .SUNDAY NIGHT...Mostly clear. Lows around 28. .MONDAY...Sunny through early afternoon then becoming partly cloudy. Highs around 40. .MONDAY NIGHT...Mostly cloudy. Lows around 36. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 43. Lows around 33. .WEDNESDAY...Sunny. Highs around 40. && Isle Royale (SE areas)- Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay- ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... .TODAY...Partly sunny. Widespread dense fog early, then patchy fog by late morning. Highs 40 to 45. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .TONIGHT...Patchy fog. A 20 percent chance of rain and snow showers late. Mostly cloudy. Lows around 35. East winds 5 to 15 mph. Waves building to 1 to 2 feet. .FRIDAY...Patchy fog through early afternoon. A 50 percent chance of rain showers and thunderstorms by mid afternoon. Mostly cloudy. Highs 45 to 50. East winds 5 to 15 mph. Waves building to 2 to 3 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, snow showers and sleet late. Mostly cloudy. Lows around 29. West winds 5 to 15 mph becoming southwest 10 to 20 mph by midnight, then becoming northwest late. Chance of precipitation 80 percent. Waves 2 to 3 feet. .SATURDAY...Breezy, cooler. Partly sunny. Highs around 33. West winds 10 to 20 mph. Waves building to 3 to 5 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 25. .SUNDAY...Partly cloudy. Highs around 36. .SUNDAY NIGHT...Mostly clear. Lows around 29. .MONDAY...Sunny through early afternoon then becoming partly sunny. Highs around 42. .MONDAY NIGHT...Mostly cloudy. Lows around 36. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 44. Lows around 34. .WEDNESDAY...Sunny. Highs around 42. && $$